1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
sergeinik [125]
3 years ago
13

Three people become infected with a virus that spreads quickly. Each day that passes, the number of infected people doubles. How

can the number of infected people be determined from the number of days that have passed?
Mathematics
2 answers:
arlik [135]3 years ago
7 0

Answer:

a_{n}=(2)^{n-1}

Step-by-step explanation:

The given problem models a geometric sequence, because each day is double than the day before.

So, if a_{1} represents the first day, r=2 represents the increasing reason and a_{n} represents the day n, or the final day you can say.

Using all these elements, the sequence can be modelled as

a_{n}=a_{1}r^{n-1}\\  a_{n}=1(2)^{n-1}\\a_{n}=(2)^{n-1}

Where the first day is 1.

For example, after 20 days, that is, n = 20, the number of infected people would be

a_{n}=(2)^{n-1}\\a_{20}=(2)^{20-1}=(2)^{19}

Therefore, the expression that models this problem is

a_{n}=(2)^{n-1}

avanturin [10]3 years ago
5 0

3x \times 2 = y
this is what I would come up with because.
y=the number of people infected
x=the number of days that have passed
You might be interested in
Simplify each expression
Hatshy [7]

Answer:

<h3>3. \:  \: ( \frac{7}{8} ) ^{2}  =  \frac{ {7}^{2} }{ {8}^{2} }  =  \frac{49}{64}  = 0.765</h3>

5. \:  \: 8 + 5(7) = 8 + 35 = 43

I hope I helped you^_^

3 0
3 years ago
15. Simplify an expression for the area of the<br>rectangle shown below.<br>8x - 2.<br>4.<br>​
lyudmila [28]

Answer:

Area of the rectangle  A   = 32 x - 8

Step-by-step explanation:

<u><em>Explanation:-</em></u>

Given that the length of the rectangle(l) = 8x-2

Given that the width of the rectangle (w) = 4

Area of the rectangle = length × width

                         A   = (8x - 2) × 4

                         A   = 32 x - 8

<u><em>Final answer</em></u>:-

Area of the rectangle  A   = 32 x - 8

3 0
3 years ago
What are the slope and y-intercept for the graph of y-4x= -2
RUDIKE [14]

Answer:

The slope is 4 and the y-intercept is (0,-2)

7 0
2 years ago
Please help me on this math question
vladimir1956 [14]
16 oz because if you do 48/16 you get 3 and 4 times $4.87 equals less then 13.97
8 0
3 years ago
Jade and Eliza went shopping at a mall. Jade spent $10 more than 5 times the amount that Eliza spent. Jade spent a total of $150
DaniilM [7]

Answer:

140

Step-by-step explanation:

Let total money spent by Eliza's be represented as x

Five times amount Eliza spent = 5x and total amount spent by Jade is $150

So it will be $10+ 5x =$150

5x= 150- 10

5x= 140

x = 140÷5

x= 28

........................

So therefore Eliza's amount spent = $28 and

5x$28 = $140

Jade spent $10 more equals $10+$140= $150(Total money spent by Jade).

8 0
3 years ago
Other questions:
  • A mom with four children decided she wanted to control how to divide up the amount of Halloween candy collected. She combined al
    9·1 answer
  • Help.... ASAP...............
    9·1 answer
  • You are 330 miles from home and you are driving toward home at an average of 55 mph. Write an equation to represent the situatio
    5·2 answers
  • Pls help 4!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
    10·1 answer
  • The coldest temperature in New York City was -15 on February 9th 1934, The next day the temperature rose 42 degrees. Write an ex
    7·1 answer
  • Write 0.1 x 0.1 x 0.1 x 0.1 using exponents
    5·2 answers
  • Choose an integer between -5 and -10. Label it ܴ on the number line created in Problem 3, and complete the following tasks.
    6·1 answer
  • Lennox owns a big apple orchard. She ships her apples to various markets using a fleet of trucks. Every week, each truck goes on
    5·1 answer
  • Ayooo guys SOMEONE TELL ME WHAT IS THE AWNSER ?
    7·1 answer
  • =
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!